Research Article
A Real-Time Location-Based Services System Using WiFi Fingerprinting Algorithm for Safety Risk Assessment of Workers in Tunnels
Table 1
The three-main-factor matrix.
|
Risk probability (L) |
Risk frequency (E) |
Factor weight (C) | Score | Probability of an accident or dangerous occurrence | Score | Probability of an accident or dangerous occurrence | Score |
Probability consequence |
| 10 | Absolutely possible | 10 | Always | 100 | Tragedy | Many death | 6 | Possible | 6 | Everyday | 40 | Very severe | Some death | 3 | Possible, but not often | 3 | Every week or occasionally | 15 | Severe | Loss of life or injured seriously | 1 | Almost not possible | 2 | Every month | 7 | Serious | Injured | 0.5 | Possible rarely | 1 | Every year | 3 | Normal | Injured slightly and can be recovered | 0.2 | Hardly possible | 0.5 | Hardly happen | 1 | Concern | Not healthy basically | 0.1 | Impossible in realty | | | | | |
|
|